Do levels of airborne grass pollen influence asthma hospital admissions?

Erbas, Bircan; Chang, Jin-Hong; Dharmage, Shyamali C.; Ong, Eng Kok; Hyndman, Rob J.; Newbigin, Ed; Abramson, Michael J.

doi:10.1111/j.1365-2222.2007.02818.x

Cited by 98 publications

(78 citation statements)

References 33 publications

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“…In Croatia, Hungary and Serbia, the threshold value amounts to 30 APG/ m 3 [16,36], whereas in Spain the first allergy symptoms were observed at 25 APG/m 3 [62]. For children and adolescents from Malmö (Sweden), nose symptom scores increased continuously and linearly with pollen counts from concentrations of 0-30 APG/m 3 , wherefrom symptom severity [64] demonstrated that a concentration of 30 APG/m 3 was sufficient to induce symptoms in most grass-allergic asthmatics in Melbourne, Australia. De Weger et al [65] found that Poaceae pollen allergic patients have more severe symptoms in the early season compared to the late season at similar concentrations.…”

Section: Discussionmentioning

confidence: 99%

Relation between Poaceae pollen concentrations and meteorological factors during 2000–2010 in Timisoara, Romania

Ianovici

2015

Acta Agrobot

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This paper presents the results of Poaceae pollen seasons from 2000-2010 in Timisoara, Romania. Airborne Poaceae pollen concentrations was high. An increasing trend in the annual totals was observed. The longest pollen season was recorded in the year 2000. The period in which the Poaceae pollen count exceeded the threshold value of 30 grains/m 3 lasted from 9 to 46 days. The present study analyzed the dynamics of pollen seasons in relation to meteorological factors. On the basis of Spearman's correlation test, the strongest positive correlation was found between the Poaceae pollen counts and temperature; and sunshine hours. Daily average relative humidity, atmospheric pressure and precipitation had a negative effect. A multiple regression analysis was applied to determine how much of the total variance in Poaceae pollen counts can be explained by meteorological parameters. The coefficient of determination ranged from 0.245 to 0.460. Our data illustrate the contrasting effects of temperature, wind, relative humidity and rainfall on the concentration of pollen in the air. The optimum conditions for Poaceae pollen release occur during late spring and early summer. The Poaceae pollen remains one of the major aeroallergens in Timisoara area.

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Section: Discussionmentioning

confidence: 99%

Relation between Poaceae pollen concentrations and meteorological factors during 2000–2010 in Timisoara, Romania

Ianovici

2015

Acta Agrobot

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“…Such results indicate that A. catechu pollen is an important aeroallergen with a significant contribution to IgE-mediated hypersensitivity and emergency asthma hospitalization. In Melbourne, it was found that the grass pollen count had a significant effect on asthma hospitalization up to a threshold of 30 grains/m 3 of air [24]. Similarly, a significant increase in daily asthma emergency admission was recorded for airborne tree pollens like Ulmas, Pinaceae members, Tsuga, Larix, Quercus, Castanea, Acer and others [25].…”

Section: Discussionmentioning

confidence: 99%

Clinico-Immunochemical Studies on Airborne <i>Areca catechu</i> L. Pollen, a Probable Risk Factor in Emergency Asthma Hospitalization from Eastern India

Chakraborty

Mandal²,

Sarkar³

et al. 2009

Int Arch Allergy Immunol

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Background: The pollen grain of the Areca catechu L. tree is airborne and allergenic. This study aimed to know the role of this pollen as a source of aeroallergen with effect on emergency asthma hospitalization, to isolate its important allergic fraction and to check its cross-reaction with betel nut. Methods:Areca pollen was monitored with a Burkard sampler. Determination of allergenic activities was studied by in vivo and in vitro analyses. Asthma hospitalization data were collected from two nearby hospitals. The pollen extract was fractionated by a combination of DEAE-Sephadex and Sephacryl S-200 column. The protein components were observed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis. Cross-reactivity of Areca pollen and betel nut was shown by IgE enzyme-linked immunosorbent assay (ELISA) inhibition. Results: The Areca pollen was perennially airborne. Skin test results of respiratory allergic patients showed 38.6% positivity. The detected aeroallergen spots in particle immunoblotting correlated significantly with airborne pollen count. Areca pollen showed a significant positive correlation with asthma hospitalization. There are 6 IgE-reactive protein components in the whole-pollen extract. IgE-reactive fraction 1 was resolved into 4 subfractions. Subfraction 1a showing IgE reactivity contained 3 protein components, among which 2 of 48 and 118 kDa were IgE reactive. The 48-kDa component was reported to be cross-reactive with other palm pollen types. In IgE ELISA inhibition, the betel nut extract showed 50% inhibition with about 110 ng/ml concentration. Conclusion:A. catechu pollen is a significant contributor to the aeroallergen load in India. Its partially purified IgE-reactive fraction may be useful in therapeutics. The betel nut extract showed remarkable cross-reactivity with Areca pollen.

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“…The majority of studies have focused on the most severe episodes, although there may be an aggravation of symptoms without needing emergency care. The relationship between effects and aeroallergen levels could be nonlinear (Tobias et al 2004;Erbas et al 2007), whereas some authors have looked for linear effects only. The study period was not always limited to the period of pollen or spore dispersal.…”

Section: Chemical and Biological Weathermentioning

confidence: 99%

Interactions of Physical, Chemical, and Biological Weather Calling for an Integrated Approach to Assessment, Forecasting, and Communication of Air Quality

Klein

Kukkonen

Dahl

et al. 2012

AMBIO

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This article reviews interactions and health impacts of physical, chemical, and biological weather. Interactions and synergistic effects between the three types of weather call for integrated assessment, forecasting, and communication of air quality. Today's air quality legislation falls short of addressing air quality degradation by biological weather, despite increasing evidence for the feasibility of both mitigation and adaptation policy options. In comparison with the existing capabilities for physical and chemical weather, the monitoring of biological weather is lacking stable operational agreements and resources. Furthermore, integrated effects of physical, chemical, and biological weather suggest a critical review of air quality management practices. Additional research is required to improve the coupled modeling of physical, chemical, and biological weather as well as the assessment and communication of integrated air quality. Findings from several recent COST Actions underline the importance of an increased dialog between scientists from the fields of meteorology, air quality, aerobiology, health, and policy makers.

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Do levels of airborne grass pollen influence asthma hospital admissions?

Cited by 98 publications

References 33 publications

Relation between Poaceae pollen concentrations and meteorological factors during 2000–2010 in Timisoara, Romania

Relation between Poaceae pollen concentrations and meteorological factors during 2000–2010 in Timisoara, Romania

Clinico-Immunochemical Studies on Airborne <i>Areca catechu</i> L. Pollen, a Probable Risk Factor in Emergency Asthma Hospitalization from Eastern India

Interactions of Physical, Chemical, and Biological Weather Calling for an Integrated Approach to Assessment, Forecasting, and Communication of Air Quality

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